Home / 140,342.20-210,513.30-81,147.40

Finding the Fourth Proportional to 140,342.20, 210,513.30 and 81,147.40

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Solution

The fourth proportional to 140,342.20, 210,513.30 and 81,147.40 is: 121,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,342.20 : 210,513.30 = 81,147.40 : x
  2. Step 2: Convert to fraction form
    140,342.20/210,513.30 = 81,147.40/x
  3. Step 3: Cross multiply
    140,342.20x = 210,513.30 × 81,147.40
  4. Step 4: Simplify right side
    140,342.20x = 17,082,606,960.42
  5. Step 5: Solve for x
    x = 17,082,606,960.42/140,342.20
  6. Step 6: Final answer
    x = 121,721.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.